Bitwise operation for state machine Post: 302880853

Sponsored Content

Top Forums Programming Bitwise operation for state machine Post 302880853 by anand.shah on Tuesday 24th of December 2013 04:23:16 AM

12-24-2013

Registered User

Bitwise operation for state machine

Hello All,
I am writing basic state machine which maintains 8 different states and there is posibility that system may be in multiple states at a time (Except for state1 to state3. menas only once state can be active at a time from state1 to state3).
I have declared enum like one below

Code:

enum
{
   state1 1
   state2 1 << 1
   state3 1 << 2
   state4 1 << 4
    ....
    ....
}

Now my requirement is that state1 to state3 can not be active at a given instance.
Example if machine is in state1 then; state variabale would be -->

Code:

 xxxx x001

... then when system changes its state to to state3 ... state variable should become

Code:

xxxx x100.

.

Note :- "x'" indicates other state variable which should not get affected because of above operations.

Thank you very much in advance.

Regards,
Anand Shah

anand.shah

View Public Profile for anand.shah

Find all posts by anand.shah

2 More Discussions You Might Find Interesting

1. AIX

Open firmware state to running state

Hi Admins, I am having a whole system lpar in open firmware state on HMC. How can I bring it to running state ? Let me know. Thanks.

2. Shell Programming and Scripting

Vim function to generate RTL Code(finite state machine) in verilog

Hi I wanted to call the AutoFsm function (given below) in vim to generate a code something like: **********verilog code to generate ************* always @(posedge clk or negedge rst_n) begin if(!rst_n) begin state_r <= #1 next_stateascii_r; ...

LEARN ABOUT MINIX

mbsinit

MBSINIT(3)						     Linux Programmer's Manual							MBSINIT(3)

NAME

       mbsinit - test for initial shift state

SYNOPSIS

       #include <wchar.h>

       int mbsinit(const mbstate_t *ps);

DESCRIPTION

       Character  conversion  between the multibyte representation and the wide character representation uses conversion state, of type mbstate_t.
       Conversion of a string uses a finite-state machine; when it is interrupted after the complete conversion of a number of characters, it  may
       need to save a state for processing the remaining characters.  Such a conversion state is needed for the sake of encodings such as ISO-2022
       and UTF-7.

       The initial state is the state at the beginning of conversion of a string.  There are two kinds of state: the one used by multibyte to wide
       character  conversion  functions, such as mbsrtowcs(3), and the one used by wide character to multibyte conversion functions, such as wcsr-
       tombs(3), but they both fit in a mbstate_t, and they both have the same representation for an initial state.

       For 8-bit encodings, all states are equivalent to the initial state.  For multibyte encodings like UTF-8, EUC-*, BIG5  or  SJIS,  the  wide
       character to multibyte conversion functions never produce non-initial states, but the multibyte to wide-character conversion functions like
       mbrtowc(3) do produce non-initial states when interrupted in the middle of a character.

       One possible way to create an mbstate_t in initial state is to set it to zero:

	   mbstate_t state;
	   memset(&state,0,sizeof(mbstate_t));

       On Linux, the following works as well, but might generate compiler warnings:

	   mbstate_t state = { 0 };

       The function mbsinit() tests whether *ps corresponds to an initial state.

RETURN VALUE

       mbsinit() returns nonzero if *ps is an initial state, or if ps is NULL.	Otherwise, it returns 0.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +----------+---------------+---------+
       |Interface | Attribute	  | Value   |
       +----------+---------------+---------+
       |mbsinit() | Thread safety | MT-Safe |
       +----------+---------------+---------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES

       The behavior of mbsinit() depends on the LC_CTYPE category of the current locale.

SEE ALSO

       mbrlen(3), mbrtowc(3), mbsrtowcs(3), wcrtomb(3), wcsrtombs(3)

COLOPHON

       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2016-10-08								MBSINIT(3)

2 More Discussions You Might Find Interesting

1. AIX

Open firmware state to running state

Discussion started by: snchaudhari2

2. Shell Programming and Scripting

Vim function to generate RTL Code(finite state machine) in verilog

Discussion started by: dll_fpga

LEARN ABOUT MINIX

mbsinit